>> this has been huge. >> reporter: scott hubbard was nasa's first mars program director. he says the next step is to build a robot that can bring samples back to earth for testing. until then scientists are excited to see what "curiosity" discovers next. >> i would die a happy man if "curiosity" gives us that indisputable fingerprint of life. complex carbon compound, boy, that would be the cherry on top of the cake. >> reporter: nasa says "curiosity" will perform more drilling in may and with this kind of progress, he believes people could be on mars by 2033. rob and diana. >> all the money we spent on that thing. good to see -- thank you, brandi. for all right money we spent -- good to see results back. interesting findings. >> the people you hate, send them to the moon. send them to mars now. >> boom, gone. >> there i am. >> there you are. >> my favorite planet. >> your favorite planet you told me more than once. >> working dayside next week will be a different planet, for sure. better get used to it. whoo. uh-uh. >>> when we come back, tiger woods' ex-wife is moving on